varmod-localtime.mk revision 1.9
1 # $NetBSD: varmod-localtime.mk,v 1.9 2023/05/09 08:26:14 rillig Exp $ 2 # 3 # Tests for the :localtime variable modifier, which formats a timestamp 4 # using strftime(3) in local time. 5 # 6 # See also: 7 # varmod-gmtime.mk 8 9 .if ${TZ} != "Europe/Berlin" # see unit-tests/Makefile 10 . error 11 .endif 12 13 # Test for the default time format, %c. Since the time always varies, it's 14 # only possible to check for the general format here. The names of the 15 # month and weekday are always in English, independent from the locale. 16 # Example: Thu Oct 29 18:56:41 2020 17 .if ${:U:localtime:tW:M??? ??? ?? ??\:??\:?? ????} == "" 18 . error 19 .endif 20 21 22 # modifier name too short, falling back to the SysV modifier. 23 .if ${%Y:L:localtim=1593536400} != "%Y" 24 . error 25 .endif 26 27 28 # 2020-07-01T00:00:00Z 29 .if ${%Y:L:localtime=1593536400} != "2020" 30 . error 31 .endif 32 33 34 # modifier name too long, falling back to the SysV modifier. 35 .if ${%Y:L:localtimer=1593536400} != "%Y" 36 . error 37 .endif 38 39 40 # If the modifier name is not matched exactly, fall back to the 41 # :from=to modifier. 42 .if ${localtime:L:local%=gm%} != "gmtime" 43 . error 44 .endif 45 46 47 # As of 2020-08-16, it is not possible to pass the seconds via a 48 # variable expression. This is because parsing of the :localtime 49 # modifier stops at the '$' and returns to ApplyModifiers. 50 # 51 # There, a colon would be skipped but not a dollar. 52 # Parsing therefore continues at the '$' of the ${:U159...}, looking 53 # for an ordinary variable modifier. 54 # 55 # At this point, the ${:U} is expanded and interpreted as a variable 56 # modifier, which results in the error message "Unknown modifier '1'". 57 # 58 # If ApplyModifier_Localtime were to pass its argument through 59 # ParseModifierPart, this would work. 60 .if ${%Y:L:localtime=${:U1593536400}} != "mtime=11593536400}" 61 . error 62 .endif 63 64 65 # Before var.c 1.631 from 2020-10-31 21:40:20, it was possible to pass 66 # negative time stamps to the :localtime modifier, resulting in dates before 67 # 1970. Going back 50 years in the past is not a practical use case for 68 # make. Therefore, since var.c 1.631, negative time stamps produce a 69 # parse error. 70 .if ${:L:localtime=-1} != "" 71 . error 72 .else 73 . error 74 .endif 75 76 77 # Spaces were allowed before var.c 1.631 from 2020-10-31 21:40:20, not 78 # because it would make sense but just as a side-effect from using strtoul. 79 .if ${:L:localtime= 1} != "" 80 . error 81 .else 82 . error 83 .endif 84 85 86 # 0 means now; this differs from GNode.mtime, where a 0 means nonexistent. 87 # Since "now" constantly changes, the strongest possible test is to match the 88 # resulting pattern. 89 .if !${:L:localtime=0:tW:M??? ??? ?? ??\:??\:?? 20??} 90 . error 91 .endif 92 93 94 .if ${:L:localtime=1} != "Thu Jan 1 01:00:01 1970" 95 . error 96 .endif 97 98 99 # INT32_MAX 100 .if ${:L:localtime=2147483647} != "Tue Jan 19 04:14:07 2038" 101 . error 102 .endif 103 104 105 .if ${:L:localtime=2147483648} == "Tue Jan 19 04:14:08 2038" 106 # All systems that have unsigned time_t or 64-bit time_t. 107 .elif ${:L:localtime=2147483648} == "Fri Dec 13 21:45:52 1901" 108 # FreeBSD-12.0-i386 still has 32-bit signed time_t, see 109 # sys/x86/include/_types.h, __LP64__. 110 # 111 # Linux on 32-bit systems may still have 32-bit signed time_t, see 112 # sysdeps/unix/sysv/linux/generic/bits/typesizes.h, __TIMESIZE. 113 .else 114 . error 115 .endif 116 117 118 # Integer overflow, at least before var.c 1.631 from 2020-10-31. 119 # Because this modifier is implemented using strtoul, the parsed time was 120 # ULONG_MAX, which got converted to -1. This resulted in a time stamp of 121 # the second before 1970. 122 # 123 # Since var.c 1.631 from 2020-10-31, the overflow is detected and produces a 124 # parse error. 125 .if ${:L:localtime=10000000000000000000000000000000} != "" 126 . error 127 .else 128 . error 129 .endif 130 131 # Before var.c 1.631 from 2020-10-31, there was no error handling while 132 # parsing the :localtime modifier, thus no error message was printed. Parsing 133 # stopped after the '=', and the remaining string was parsed for more variable 134 # modifiers. Because of the unknown modifier 'e' from the 'error', the whole 135 # variable value was discarded and thus not printed. 136 .if ${:L:localtime=error} != "" 137 . error 138 .else 139 . error 140 .endif 141 142 # Before var.c 1.TODO from XXXX-XX-XX, the timestamp could be directly 143 # followed by the next modifier, without a ':' separator. This is the same 144 # bug as for the ':L' and ':P' modifiers. 145 .if ${%Y:L:localtime=100000S,1970,bad,} != "bad" 146 . error 147 .endif 148 149 all: 150
Indexes created Wed Oct 01 18:09:54 GMT 2025